Saw-filing clamp



A ugg. 3 192s. 1,594,811

F. J. BIRD SAW FILING CLAMP Filed August 14, 1924 i f l 4 EIM/tunic@ 8 chmod 5h70 Patented Aug. 3. 1926,

f :i w1,594,811

FRED J. BIRD, OF NEVADA COUNTY, NEAR DONNER, CALIFORNIA.

saw-FILING CLAMP.

' Application mea August 14, 1924. serial No. 732,080.

This invention relates to clamping devices as used for holding carpenters saws in ling the teeth, and the principal object of the invention is to provide such a device which will be portable, of more stability than the devices heretofore available, and which .willy dispense with the present necessity of securing such devices to the workbench when in use.

I achieve the desired objectives by the savr filing clamp shown in the accompanying drawings, and in which :-w

Figure 1 is a front elevation of my clamp with a saw dotted in position, Figure 2 is a side view of Figure 1 with the clamp open and saw omitted, Figure 3 is an enlarged sectional detail of the device as seen from the line 3 3 of Figure 1 showing the clamping leverage system, Figure 4 is an enlarged sectional detail of Figure 2 as seen from the line 44 thereof showing the pivot joint construction, and Figure 5 is an enlarged sectional view of the forward clamping jaw as seen from the line 5 5 of Figure 1.

Briefly described my improved saw filing clamp consists of a light (preferably angle or T iron) frame work of elongated form and adapted for standing on the floor, steadied against any convenient table, braced with one foot and provided with a lever operated by the other foot for clamping the saw.

The entire device may of course be made of wood or of mixed wood and metal construction, but I prefer. to construct it of light T iron as shown in the drawings and in which the frame consists of a front portion 1 and a rear portion 2 pivoted together on a transverse bar or pipe 3 positioned in notches on the legs of the T iron frame and kept from longitudinal shifting by the bolts 4 which pass through the web of the T irons and anchor the joint when the strain is placed upon it in clamping the saw.

At the upper ends the front and rear frame portions each carry an angle iron jaw 5 between which the saw blade 6 is clamped and at the lower end of the forward frame is a transverse piece 7 adapted for steadying by the foot of the workman, and just above it is a foot treadle 8 connected to a system of toggle levers for forcing the lower portions of the frame apart so as to bring the jaws at the upper ends of the frame together to clamp thev saw.

This lever 8 is guided between the frame sides which are brought together to form a slot 9 at the lower part of the frame as shown and along one side of the slot a series of notches 10 is formed to serve as a ratchet into which the lever springs sidewise and is retained until kicked in the opposite direction to release it.

The lever carries a pair of rollers 11 rolling along the web of the T irons of the foremost frame adjacent the slot and is pivoted at its remote end to a pair of links 12 by a pin 13.which carries on its ends a pair of rollers 14 rollingon the webs of the rear frame, while the links extend forwardly and are pivoted on a bolt 15 passing through both legs of the T irons of the forward frame.

By this arrangement it will be seen that the T irons form a species of boxing or rectangular enclosure in which the leverage works and is protected from injury.

The clamping jaws at the upper end of the frame portions are arranged so as to be slightly adjustable to conform tightly to the saw and to concentrate the clamping pressure nearer their upper edges. This is done by cutting out the leg of the T irons slightly as shown at 16 in Figure 5 and forming a hump 17 on each leg adapted to bear against the jaw relatively nearer its upper edge, and the jaws are loosely held in position by bolts 18 which are loose in their holes to permit slight wobbling of the jaws so that the jaws are slightly free to adjust themselves. v

Having thus described my invention what I claim is z- 1. A saw filing clamp comprising a frame having saw clamping jaws at its upper end and being elongated for support on the floor to bring the jaws at a convenient working height, a foot rest on the frame adjacent its lower end adapted for bracing the frame by the foot of the user of the device, leverage means on the frame adapted for forcing the jaws together, and a foot lever near the lower end of the frame arranged to actuate the leverage means, said frame having a ratchet thereon adapted to be engaged by said Mfoot lever.

2. A saw ling clamp comprising a pair of frames pvoted together n confronting relation whereby the ends of the frames may be moved to and froml one smother7 clamping 5 jaws Von one end of the frames ada ted for olamp'nfg' svf`dijon'movgthe 'mee tgetherzft that end, and leverage means'v between the frame adapted for moving the frames to clamp the jaws, Saud frames belng made of angle seotlon lron arranged to form a boxlng embraolng the leverage means,

said frame having a ratchet thereon adapted u.: L .L Mft 11': y .1 ug' U1 l'j! U to bey enggged by sald leverage Ineens. 

